Carbonate-carbonate coupling on platinum surface promotes electrochemical water oxidation to hydrogen peroxide.

ABSTRACT: Water electro-oxidation to form H₂O₂ is an important way to produce H₂O₂ which is widely applied in industry. However, its mechanism is under debate and HO_(ads), hydroxyl group adsorbed onto the surface of the electrode, is regarded as an important intermediate. Herein, we study the mechanism of water oxidation to H₂O₂ at Pt electrode using in-situ Raman spectroscopy and differential electrochemical mass spectroscopy and find peroxide bond mainly originated from the coupling of two CO₃^2- via a C₂O₆^2- intermediate. By quantifying the ¹⁸O isotope in the product, we find that 93% of H₂O₂ was formed via the CO₃^2-

SUBMITTER: Zhu H 

PROVIDER: S-EPMC11471758 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature